And now he says Daddy!

My son soon to 17 months.
I bought this set of four small books after reading the good reviews here. After receiving it, I thought I had made a mistake.
These little books are rather simple, short phrase on every page of illustrations not very nice in my opinion.
And yet they love. Why? Maybe the colors? Maybe he understands situations staged by dad and therefore me. Anyway after reading him dad eats, dad gets angry, picnic Dad ... and Dad said it now;)
Like what we did our own opinions on what will please them or not and sometimes we are in the wrong!
Some situations puzzles me but I dare not say anything;)